Time-control cut-out switch



Nov, s, 1927. 1,648,506

A, PLEIN ET ALV. TIME coNTRoL-cUT-OUT SWIHTQH Fil-ed July 19. 1926.

Patented Nov. s, 1927;

ADAM PLEIN AND ,JOSEPH W. HOFFMANN,

or PEWAUKEE, WiscoNsIN, 'AssIGNQRs or ONEfFOURTH TO GEORGE CLOOS, OF MILWAUKEE, WISCONSIN.

TIME-CONTROL CUT-OUT SWITCH.

Application filed July 19,

This invention relates to time control cutout switches.

Although the invention may be applied to a large number of uses it is particularly intended for use'in connection with a radio receiving set.

In radio receiving sets, it is the usual custom to turn on the A battery and tune in the station. Thereafter, the operator usually leaves the set and attends to other work, allowing the set to operate Without any attention on his part. lt fr' uently happens that he forgets to shut the gi battery off, even after the station has ceased sending. There is nothing to callhis attention to the fact that the A battery is being used, and it frequently happens that the battery is completely depleted by this needless expenditure of energy.

This invention is designed to overcome 'the defects noted above, and objects of such invention are to provide atime control cutout switch, particularly adaptedfor use in con-- nection with radio receiving apparatus, and so designed that the operator may readily set the switch to open at any desired time, and thus to cut out and save the A battery.

Further objects are Yto provide a simple and neat type of switch Which may be combined with an ordinary alarm clock Without detracting from the apparatus of the clock, and which may be readlly connected with. the radio receiving set and with a storage battery or other type of A battery.

An embodiment of the invention is shown in the accompanyingy drawings in which:m

Figure 1 is a view of the apparatus as it' appears when in operation;

Figure 2 is a side view of the switch and clock with which it is associated.

Referring to the drawings, it will be seen that a conventional type of radio receiving apparatus is provided, as indicated by the reference character 1,*and that this receiving set is rovided with binding posts or other terminals 2, adapted to be suppliedl from the A battery 3.

An ordinary type of alarm clock'4 is employed, and the alarm shaft or Winding shaft 5 is preferably extended and` providedwith an operating arm 6.-Thisshaft is also provided with an oval or other shaped cam 7 which operates between a pair of spring fingers 8. rlhese spring fingers are carried by aninsulating block 9, rigidly secured t'o the 1926. Serial No. 123,426.

back of the alarm clock. Further, it is to be noted that the cam 7 is provided with a pin 10 to limit its motion. This pin operates Within a slot 11 formed in one of the spring arms 8, as most clearly shown in Figure 2. The springfingers 8 are-provided With apair 'of contact-s 12 which are adapted to close the A battery circuit when they are to ether.

A pair of con uctors 13 yand 14 extend from the contact lingers '8.- One of these conductors leads to a binding post 2 and the other is preferably provided with a spring clamp 15 adapted to engage a terminal of the battery 3. A third conductor 16 extends from the other binding post 2, to the remainf ing terminal of the battery and is. similarly provided With a Contact clamp 15.

ln using the apparatus, it is merely necessary to set the alarm at any desired point,

such alarm being usually set by means of an adjusting knob 17. Thereafter, the operator locks the-lever 6 to the left, as shown in Figure 1, and thus permits the spring fingers 8 to close the A battery circuit. Thereafter, the operator may leave the set with assurance that the battery will be cut od after the desired interval has elapsed,

lt Will be seen, therefore, that a novel combination has been provided, whereby the Wasting of the battery for a radio receiving set is prevented. Further, it will be seen that the clock may serve at its usual capacity without. detracting from its appearance or its customary mode of functioning.

It will be seen further, that one of the spring arms is so related to the cam that it will arrest the motion of the cam at th desired point.

Although the invention has been described. in considera-ble detail, such description is intended asl illustrative rather than limiting as the invention may be variously embodied and as the scope of suchinvention is to be determined as claimed.

I claim:

In a time control switch, the combination of an alarm clock provided With an alarm arbor, a cam carried by said arbor, an insulating member secured to the bodyportion of said clock, a pair of spring arms embracing said cam and carried by said insulating member and having contacts adapted to close an electric circuit, one of said spring arms having a slot formed therein having terminal lninjiiuns, smid urbur having;r a projecting member adapted to operate in said. Slot i0 thus limit the motion of said arbor, whereby said cam is stopped, when the spring arms are separated, by the conmeting of the projecting member with a terlmnal portlon of the Slot.

ADAM PLEIN. JOSEPH W. HUFFMANN. 

